Rolling-mill.



A. A. K. NOWAK.

ROLLING MILL.

APPLICATION FILED MAY 16, 1911.

1,024,485, Patented Apr. 23; 1912.

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ADOLF ALEXANDER KARL NOWAK, OF BOUS-ON-TI-IE-SAAIR GERMANY.

ROLLING-MILL.

Specification of Letters Patent.

Patented Apr. 23, 1912.

Original application filed April 21, 1910, Serial No. 556,831. Dividedand. this application fi1ed May 16,

To all whom it may concern:

Be it known that .I, ADOLFALEXANDER :KARL Nowxx, a subject of theEmperor of Austria-Hungary, and residing at Bous-onthe-Saar, Germany,have invented a certain new and Improved Rolling-Mill, of which thefollowing is a specification.

My invention relates to rolling mills and particularly to mills of theplanetary roll type, the object of my invention being to improve thesame in the particulars hereinafter pointed out.

The present application is a division of my copending application SerialNo. 556,881, filed April 21, 1910.

In rolling mills of the type to which this invention relates, it hasbeen proposed by me to arrange the rolls in radial bearing slots in theroll carrier, the roll bearings being subjected to inwardly directedpressure from springs and being forced outward against the action ofthese springs during the working portion of the travel of the rolls bystationary gudies mounted on the frame of the mill. This arrangementhowever does not altogether prevent the injurious shocks which occur notonly when the rolls strike the stationary guides, but also when theyleave the latter and are thrust down into the bottoms of the bearingslots by the expanding springs. On each revolution of the carrier asmany shocksoccur as there are rolls mounted thereon, viz., four times oneach revolution, in the mill shown. Inasmuch as the mill is rapidlydriven, that is, at the rate of approximately three hundred revolutionsa minute, a great number of these shocks are caused, which tend toinjure not only the gearing and the roll axles, but also the rollcarriers, the guides and the frame of the mill. These shocks are avoidedaccording to the present invention, by arranging outer guides as well asinner guides. Through the cooperation of these outer and inner guidesthe shocks which occur when the rolls impinge upon and also when theyleave the guides (through the thrust of the roll bearings down into thebottom of their guide slots by the bearing springs) in the form of millmentioned, are entirely avoided.

In the accompanying drawings, Figures 1 and 2 are vertical longitudinalsections through a rolling mill in which my invention is illustrated inone form, the rolls be- Serial No. 627,541.

ing shown in difierent positions; and Fig. 3 is a vertical section onthe line AB, Fig. 2.

Referring to the drawings, I mount in the usual manner upon the frame aof the mill the roll carriers 64 in the radial slots a of which theaxles c, of the rolls 6, have their hearing. The outer and innerguides,m and d respectively, which are rigidly secured to (or formed in onewith) the mill frame, are so formed and arranged as to lead the axles cof the rolls 6 without shock through the working portion of theirtravel. While in the earlier form of mill referred to, springs areemployed to press the rolls inwardly, in the present arrangement withthe cooperating inner and outer guides, I employ only the springs gwhich tend to press the rolls radially outward, thus reinforcing thecentrifugal action which-takes place during the operation of the mill.By reason of this arrangement the rolls which are out of contact withthe blank and guides- (that is the temporarily non-working rolls), areforced to the outer extremity of their bearing slots, as shown in Figs.1 and 2. As the roll enters between the guides m and d (Fig. 2), itmeets the incline of the outer guide m and is gradually and withoutshock forced radially inward against the inner guide d to the point atwhich the blank is attacked by the roll. At the end of its workingtravel the roll has been forced out to the end of its bearing slot bythe inner guide d, in which position it is maintained by the springs gand (during operation) by centrifugal force.

The guides m and d are so shaped that the rolls meet and leave them withthe least possible shock. Obviously the precise form illustrated may bevaried within the scope of the claims without departing from myinvention and I do not limit myself to the form shown.

I claim as my invention 1. In a rolling mill of the character described,a rotatable roll carrier, rolls displaceably mounted thereon, and guidesspaced radially apart with relation to the roll carrier axis andarranged to engage the roll spindles between the juxtaposed faces ofsaid guides during the working portion of the stroke of the rolls.

2. In a rolling mill of the character described, a rotatable rollcarrier, rolls displaceably mounted thereon, and guides spaced radiallyapart with relation to the roll carrier axis and arranged to engage theroll spindles between the juxtaposed faces of said guides during theworking portion of the stroke of the rolls, said outer guide beingarranged to meet said roll spindle at the approach to its working traveland lead it inward to the inner guide.

3. In a rolling mill of the character described, a rotatable rollcarrier, rolls displaceably mounted thereon, and guides spaced radiallyapart. with relation to the roll carrier axis and arranged to engage theroll spindles between the juxtaposed faces of said guides during theworking portion of the stroke of the rolls, said outer guide beingarranged to meet said roll spindle at the approach to its working traveland lead it inward to the inner guide, and said inner guide being shapedto force said roll outward. toward the end of its working travel to itsextreme outer position, whereby shock incident to the meeting andleaving of said guides by the roll is minimized, substantially asdescribed.

4. In a rolling mill of the character described, a frame, a roll carrierrotatable therein, rolls displaceably mounted in said carrier, and rolluides arranged directly on said frame and spaced apart to embrace theroll spindles during the working portion of the stroke of the rolls.

5. In a rolling mill of the character de scribed, a frame, a rollcarrier rotatable therein, rolls displaceably mounted in said carrier,and roll guides arranged directly on said frame and spaced apart toembrace the roll spindles during the working portion of the stroke ofthe rolls, said guides being shaped to displace said rolls inward on thecarrier to the working portion of their strokes, determine the workingtravel thereof and then lead said rolls outward on said carrier,substantially as described.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

ADOLF ALEXANDER KARL NOWAK.

VVit-nesses M. BRUXMEIER, T. Frsorirn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, 1). U.

